Only about 3.5 percent of Alabama’s population is foreign-born, according to the Census Bureau. Undocumented immigrants made up roughly 4.2 percent of its work force in 2010, according to the Pew Hispanic Center. But the drafters of Alabama’s harsh immigration law wanted to turn their state into the country’s most hostile territory for illegal immigrants. They are succeeding, as many of Alabama’s most vulnerable residents can attest.